Author: Tony Hedlund
Date: 07:48:24 08/23/05
Go up one level in this thread
On August 23, 2005 at 08:19:48, Richard Pijl wrote: >On August 23, 2005 at 05:43:48, Tony Hedlund wrote: > >>Here are five positions that give you an indication of how strong your engines >>are in endgames. > >The Baron, WCCC version _without_ EGTB's on a Xeon 2.8Ghz: > >>White to move, and it's a draw. >> >>The first one is very easy. Every program should find it, even without tbs. >> >>[D] 8/8/8/8/8/7n/6Kn/k6r w - - 0 1 > >Baron finds it instantly with a drawscore Here the program must know that there's no checkmate with two knights. >>The next two are harder. But a good program ought to make it, if it get some >>time. >> >>[D] 1k6/ppr5/2b5/8/1KB5/8/7R/8 w - - 0 1 > >Rh8, found instantly with a drawscore After 1.Rh8+ Rc8 2.Rxc8+ Kxc8 3.Ba6! bxa6 the program must know that the black bishop have the wrong color. >>[D] 8/8/7p/3KNN1k/2p4p/8/3P2p1/8 w - - 0 1 > >No drawscore (or 'no progress' score) within 15 minutes Here's the idea to build a fortress around the black king. >>The last two are studies, and very difficult. They are probably unsolvable by >>programs. >> >>[D] Kn6/8/8/3R2PB/8/2p2NP1/1q6/2k5 w - - 0 1 > >Rd1 selected at 1:01. Not a drawscore within 15 minutes, but score going towards >0 1.Rd1+ is the right first move. But the idea is to eventually build the famous "Karstedt fortress" with the knight on d5 and the bishop on b7. Some programs probably have that knowledge. Tony >>[D] 6R1/P2k4/r7/5N1P/r7/p7/7K/8 w - - 0 1 > >Not found within 15 minutes > >Richard.
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